AD7738BRU Analog Devices Inc, AD7738BRU Datasheet - Page 8

• Manufacturer Part Number: AD7738BRU
• Description: IC ADC 24BIT 8-CH 28-TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD7738BRU

• Rohs Status: RoHS non-compliant
• Number Of Bits: 24
• Sampling Rate (per Second): 15.4k
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 100mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP (0.173", 4.40mm Width)
• For Use With: EVAL-AD7738EBZ - BOARD EVAL FOR AD7738

AD7738
Pin No. Mnemonic
15
16
21
22
23
24
25
26
27
28
ADCIN(–)
ADCIN(+)
REFIN(+)
REFIN(–)
AGND
RDY
DOUT
DIN
DV
DGND
DD
Pin Description
ADC Negative Input. In normal circuit configuration, this pin should be connected to the MUXOUT– pin.
ADC Positive Input. In normal circuit configuration, this pin should be connected to the MUXOUT+ pin.
Positive Terminal of the Differential Reference Input. REFIN+ voltage potential can lie any where between
AV
Negative Terminal of the Differential Reference Input. REFIN– voltage potential can lie any where between
AV
Ground Reference Point for Analog Circuitry
Logic Output. Used as a status output in both conversion mode and calibration mode. In conversion
mode, a falling edge on this output indicates that either any channel or all channels have unread data
available—according to the RDY function bit in the I/O Port register. In calibration mode, a falling edge
on this output indicates that calibration is complete. See more details in Digital Interface Description
section later in this data sheet.
Serial Data Output with serial data being read from the output shift register on the part. This output
shift register can contain information from any AD7738 register depending on the address bits of the
Communications register.
Serial Data Input (Schmitt triggered) with serial data being written to the input shift register on the part.
Data from this input shift register is transferred to any AD7738 register depending on the address bits of
the Communications register.
Digital Supply Voltage, 3 V or 5 V Nominal
Ground Reference Point for Digital Circuitry
DD
DD
and AGND. In normal circuit configuration, this pin should be connected to a 2.5 V reference voltage.
and AGND. In normal circuit configuration, this pin should be connected to a 0 V reference voltage.
PIN FUNCTION DESCRIPTION (continued)
–8–
REV. 0